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Use pmap_mapdev()/unmapdev() to temporarily map on-chip sram while copying

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the startup trampoline code.  The old code allocated a kva page, mapped it
using using pmap_kenter_nocache(), then freed the kva without destroying
the mapping.  This is the only use of pmap_kenter_nocache() in the system,
so redoing this one use of allows it to be garbage collected in the
near future.
This commit is contained in:
Ian Lepore 2015-03-26 19:33:07 +00:00
parent 70ca622987
commit 16b2a62ec4
1 changed files with 3 additions and 7 deletions
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10
sys/arm/mv/armadaxp/armadaxp_mp.c
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@ -106,7 +106,7 @@ void
platform_mp_start_ap(void)
{
uint32_t reg, *src, *dst, cpu_num, div_val, cputype;
vm_offset_t smp_boot, pmu_boot_off;
vm_offset_t pmu_boot_off;
/*
* Initialization procedure depends on core revision,
* in this step CHIP ID is checked to choose proper procedure
@ -114,22 +114,18 @@ platform_mp_start_ap(void)
cputype = cpufunc_id();
cputype &= CPU_ID_CPU_MASK;
smp_boot = kva_alloc(PAGE_SIZE);
pmap_kenter_nocache(smp_boot, 0xffff0000);
dst = (uint32_t *) smp_boot;
/*
* Set the PA of CPU0 Boot Address Redirect register used in
* mptramp according to the actual SoC registers' base address.
*/
pmu_boot_off = (CPU_PMU(0) - MV_BASE) + CPU_PMU_BOOT;
mptramp_pmu_boot = fdt_immr_pa + pmu_boot_off;
dst = pmap_mapdev(0xffff0000, PAGE_SIZE);
for (src = (uint32_t *)mptramp; src < (uint32_t *)mptramp_end;
src++, dst++) {
*dst = *src;
}
kva_free(smp_boot, PAGE_SIZE);
pmap_unmapdev((vm_offset_t)dst, PAGE_SIZE);
if (cputype == CPU_ID_MV88SV584X_V7) {
/* Core rev A0 */
div_val = read_cpu_clkdiv(CPU_DIVCLK_CTRL2_RATIO_FULL1);